iOS 11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 6, released on 2018-05-29T17:16:20Z. The update package is 267.83 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6eb8c8c4f507f8424564be33d6396227ff708ab4.zip.